Graco GT 750 Instructions Manual
Instructions
GT 750 Grease
3A5363B
Pump
For transferring grease using a medium pressure, high volume pump. For professional use
only.
Model No.:
24W337, Series A: 400 lb (180 kg) drum length
25D116, Series A: 120 lb (55 kg) drum length
24W498, Series A: stubby length
3600 psi (24.8 MPa, 248 bar) Maximum Working
Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
EN
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
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Air Motor
Warnings
WARNING
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific
hazard symbols and warnings not covered in this section may appear throughout the body of this manual where
applicable.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgi-
cal treatment.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking,
or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
FIRE AND EXPLOSION HAZARD
When flammable fluids are present in the work area, such as gasoline and windshield wiper fluid, be
aware that flammable fumes can ignite or explode. To help prevent fire and explosion:
• Use equipment only in well-ventilated area.
• Eliminate all ignition sources, such as cigarettes and portable electric lamps.
• Ground all equipment in the work area.
• Keep work area free of debris, including rags and spilled or open containers of solvent and gasoline.
• Do not plug or unplug power cords or turn lights on or off when flammable fumes are present.
• Use only grounded hoses.
• Stop operation immediately if static sparking occurs or you feel a shock. Do not use equipment
until you identify and correct the problem.
• Keep a working fire extinguisher in the work area.
2 3A5363B
Warnings
WARNING
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical Specifi-
cations in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For complete
information about your material, request Safety Data Sheets (SDSs) from distributor or retailer.
• Turn off all equipment and follow the Pressure Relief Procedure when equipment is not in use.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and create safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
MOVING PARTS HAZARD
Moving parts can pinch, cut or amputate fingers and other body parts.
• Keep clear of moving parts.
• Do not operate equipment with protective guards or covers removed.
• Pressurized equipment can start without warning. Before checking, moving, or servicing equipment, follow the Pressure Relief Procedure and disconnect all power sources.
TOXIC FLUID OR FUMES HAZARD
Toxic fluids or fumes can cause serious injury or death if splashed in the eyes or on skin, inhaled, or
swallowed.
• Read Safety Data Sheets (SDSs) to know the specific hazards of the fluids you are using.
• Store hazardous fluid in approved containers, and dispose of it according to applicable guidelines.
PERSONAL PROTECTIVE EQUIPMENT
Wear appropriate protective equipment when in the work area to help prevent serious injury, including
eye injury, hearing loss, inhalation of toxic fumes, and burns. Protective equipment includes but is not
limited to:
• Protective eyewear, and hearing protection.
• Respirators, protective clothing, and gloves as recommended by the fluid and solvent manufacturer.
3A5363B 3
Installation
A
B
C
D
E
F
H
K
J
G
L
Installation
Typical Installation
FIG. 1
Key:
A Grounded Air Line
B Bleed-type Master Air Valve
CAir Filter
D Air Line Oiler
E Air Regulator
F Fluid Hose
G Elevator Assembly
H Ground Wire
J Follower Plate
K Drum Cover
L Air Motor
4 3A5363B
Installation
Z
Y
Installation Instructions
NOTE: The reference letters in the following instructions
refer to the Typical Installation illustration, page 4.
Grounding
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Grounding provides an escape wire
for the electric current.
Pump: use ground wire and clamp (as shown in FIG. 2).
Connect the other end of the ground wire to a true earth
ground.
1. Remove the ground screw (Z) and insert through
eye of the ring terminal at end of ground wire (Y).
2. Fasten the ground screw (Z) back into the pump and
tighten securely.
Mounting the Pump
Mount the pump securely so that it cannot move
around during operation. Failure to do so could
result in personal injury or equipment damage.
• Select a convenient installation location for the
equipment to ensure easy operator access to the
pump air controls, sufficient room to change supply
containers, and a secure mounting platform.
• If you are mounting the pump directly on the supply
tank, position the pump so its intake valve is no
more than 1 in. (25 mm) from the bottom of the container. Mount the pump to the cover or other suitable
mounting device.
• Mount the pump to suit the type of installation
planned. Very heavy lubricants may require an
inductor plate.
FIG. 2
Air and fluid hoses: use only electrically conductive
hoses.
Air compressor: follow manufacturer’s recommendations.
Dispense valve: ground through connection to a properly grounded fluid hose and pump.
Solvent pails used when flushing: follow local code.
Use only conductive metal pails, placed on a grounded
surface. Do not place the pail on a non-conductive surface, such as paper or cardboard, which interrupts
grounding continuity.
To maintain grounding continuity when flushing or
relieving pressure: hold metal part of the dispense
valve firmly to the side of a grounded metal pail, then
trigger the valve.
• Install the air line accessories as shown in the Typical Installation, page 4. Install a bleed-type master
air valve (B) within easy reach of the pump,
upstream from the air regulator. Install an air filter
(C) to remove harmful dirt and moisture from your
compressed air supply. For automatic air motor
lubrication, install an air line oiler (D) close to the
pump air inlet. Install an air regulator (E) to control
pump speed.
A bleed-type master air valve (B) is required to shut
off and relieve air pressure that may be trapped in the
air motor. Trapped air could cause the pump to cycle
unexpectedly and cause serious bodily injury, including amputation.
• Be sure the air hose is properly sized to deliver an
adequate supply of air to the motor. Refer to the
Technical Data on page 15.
• Connect a dispensing hose to the pump outlet.
Install an appropriate dispensing valve to the hose.
• Ground the pump as explained on page 5.
3A5363B 5
Operation
Operation
NOTE: The reference letters in the following instructions
refer to the Typical Installation illustration, page 4.
This pump is designed to be used only in pumping
non-corrosive and non-abrasive lubricants. Any
other use of the pump can cause unsafe operating
conditions and component rupture, which can result
in fluid injection or other serious injury or fire or
explosion.
Pressure Relief Procedure
Follow the Pressure Relief Procedure whenever
you see this symbol.
This equipment stays pressurized until pressure is
manually relieved. To help prevent serious injury from
pressurized fluid, such as skin injection, splashing
fluid and moving parts, follow the Pressure Relief Procedure when you stop dispensing and before cleaning, checking, or servicing the equipment.
Priming and Pump Speed
Adjustment
1. Open the bleed-type master air valve (B).
2. Open the dispensing valve, and slowly open the air
regulator (E) until the pump is running smoothly.
3. After all the air is purged, close the dispensing
valve.
The pump will start and stop as the valve is opened
and closed.
4. Use the air regulator (E) to control the pump speed
and fluid pressure. Always use the lowest pressure
necessary to obtain the desired results.
5. If the pump accelerates quickly or is running too
fast, stop it immediately and check the fluid supply. If
the supply container is empty and air has been
pumped into the lines:
a. Refill the supply container.
b. Prime the pump and fill the lines with fluid to
remove all the air from the fluid lines.
1. Close the supply pump’s bleed-type master air valve
(B) (required in the system).
2. Open the dispensing valve until the pressure is fully
relieved.
6 3A5363B
Never allow the pump to run dry of the fluid being
pumped. A dry pump quickly accelerates to a high
speed and may damage itself. If your pump accelerates quickly or is running too fast, stop it immediately
and check the fluid supply. If the supply container is
empty and air has been pumped into the lines, prime
the pump and lines with fluid, or flush the pump and
leave it filled with a compatible solvent. Be sure to
eliminate all air from the fluid system.
NOTICE
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